Annual report pursuant to Section 13 and 15(d)

Stock Plans and Management Compensation (Details 3)

v2.4.0.8
Stock Plans and Management Compensation (Details 3) (USD $)
In Millions, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]      
Excess Tax Benefit from Share-based Compensation, Financing Activities $ 37.2 $ 5.3 $ 0
Percentage of premium paid out in deferred company common stock 20.00%    
Performance Shares [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation expense 5.0 2.2  
Weighted average expected life (in years) 2 years 10 months 24 days 2 years 10 months 24 days  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]      
Outstanding at January 1 96,000 0  
Granted 153,000 99,000  
Forfeited 0 (3,000)  
Outstanding at December 31 249,000 96,000  
2013 [Member] | Performance Shares [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]      
Unrecognized compensation cost 0.9    
Unrecognized compensation cost, period for recognition 2 years    
2012 [Member] | Performance Shares [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]      
Unrecognized compensation cost $ 0.1    
Unrecognized compensation cost, period for recognition 1 year    
Unvested performance based awards 15,400    
Certain senior executives [Member] | Performance Shares [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted average price at grant date (in dollars per share) $ 35.93 $ 26.81  
Risk-free interest rate 0.40% 0.40%  
Dividend yield 0.10% 0.20%  
Volatility factor 53.00% 67.87%  
Non-executive officers and certain senior managers [Member] | 2013 [Member] | Performance Shares [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted average price at grant date (in dollars per share) $ 34.65    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]      
Granted 26,000